Update as of Feb. 6: This very popular model of Geiger counter, the Rad 100, is now back in stock, for immediate shipment.
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The recent stepchild to the Radalert 100X, and as in its parent model, the Rad 100 is designed for general purpose monitoring of radioactivity.
The Rad 100 is identical to the Radalert in most every respect. The main difference is that the Rad 100 has no user adjustable audible Alert feature, making possible substantial savings to the consumer.
Like the Radalert 100, the Rad 100 otherwise offers these main features:
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The Rad 100 is an excellent value for the money, offering good sensitivity in a user friendly Geiger counter with digital readout.
This item typically ships within 1 business day.
Specifications for the Rad 100:
Detector |
Halogen-quenched, long thin cylindrical Geiger-Mueller tube (LND712) with side wall of .012" #446 stainless steel, and with thin mica end window |
Window Size |
1.5 to 2.0 mg/cm² thick; |
Radiation Detected | Alpha, Beta, Gamma, X-ray |
Sensitivity | Detects alpha down to 2.5 MeV; efficiency at 3.6 MeV > 80% |
Detects beta at 50 keV w/35% efficiency, at 150 keV w/75% | |
Detects gamma and X rays down to 10 keV thru window, 40 keV minimum through case; gamma sensitivity is 1,000 CPM/mR/hr referenced to Cs-137 | |
Normal background is approximately 10 to 20 CPM | |
Accuracy |
± 10%typical; ±15% max. |
Operating Ranges |
.001 to 110 mR/hr; .01 to 1,100 µSv/hr; 0 to 350,000 CPM; 0 to 3,500 CPS; Total from 1 to 9,999,000 counts; Timer: up to 40 hours |
Anti-Saturation | "Jam" protection allows readout out to hold at full scale in high radiation fields |
Indicators | LED display, red LED count light, audible beeper for count rate, and audible alert |
Display | 4-digit liquid crystal display with mode indicators; updates every 3 seconds |
Count Light | Red LED flashes with each count |
Beeper | Chirps for each count (can be muted) |
Calibration |
At factory to NBS standard Cesium 137 gamma source |
Temperature Range | -10 deg. to +50 deg. C, 14 deg. to 122 deg. F |
Power Required |
One 9-volt alkaline battery (included in price of the unit) |
Battery Life |
2,160t 625 hours at 1 mR/hr with beeper off |
Weight |
225 grams (8 oz.) including battery |
Size |
150 x 80 x 30 mm (5.9 x 3.2 x 1.2 in.) |
Output Port | Stereo 3.5 mm jack on side sends counts to computers, data loggers, other CMOS-compatible devices, and headphones |
Input Port | Mono 2.5 mm jack provides electronic calibration input |
Options | Computer cable and software (See Software) |
Warranty | Two year limited on instrument, 1 year on Geiger-Mueller tube; includes CE mark |
Country of Make |
USA |